Improved apparatus for drying paper



@time @anni (time wwf-esteem M- uvam A. E. HARDiNG, OF MiDDLETOwN, OHIO,AssicNOe To HA RDiNG;

ERWIN, AND COMPANY, OF sAME PLACE. i f

Letters Patent N o. 86,666, dated Feb'rua/ry 9, 1869.

IMPRQVED APPARATUS FOR DRYIN G- PAPER.

*dmv- The Schedule referred to in Haase Letters Patent and making partof the same.

To all whom 'it 'ma/y conce/rn:

Be it known thatI, A. E. HARDING, of Middletown, in the county ofButler, in the State of Ohio, have invented certain new and usefulImprovements in Apparatus for Drying Writing-Paper; and I do herebydeclare that the following is a full and exact description thereof,reference being had to the accompanying drawings, and to the letters ofreference marked thereon.

Figure l represents a vertical transverse section of a paper-dryinghouse, with a blower, hot-air chamber, or drum, and a furnace, taken atthe line z z, tig. 5.

Figure 2 represents a vertical longitudinal section of a drying-house,exhibiting one of the interior series of Ventilating-lines, taken at theline :1; x, fig. 5.

Figure 3 represents an end view of the drying-house,

. with the furnacadoor and smoke-dues.

Figure 4 is a perspective View of portions of the airdistributing tubes,with their adjustable gates, for the admission of hot air to thedrying-lofts.

Figure 5 represents a horizontal section of the sec- (gud story of thedryiug-house, taken at the line y y,

My invention relates to a new method of drying writing-paper, byartificial means, in a more perfect, economical, and expeditious mannerthan it has hithert been accomplished. v

It is well known to those familiar with the art ot manufacturingwriting-paper that such paper, being prepared with animal-sizing, issubject to injury in drying. This frequently occurs from several causes,

such as sultry, damp weather, continued exposure in a humid, heatedatmosphere for an undue period of time, and from inequality of heat andcirculation f air in the dryinglofts or chambers.

r.lhe object of my invention is to overcome these causes of damage andinjury, by providing efficient means of controlling the temperature,quality, and quantity, as well as the circulation, of the air admittedinto the drying-chambers. x

My improved apparatus will cause uniformity of temperature, andconstant, thorough diffusion of the volume of air continuously passingthrough the dry. ing-lofts, thereby drying the,l paper in a uniform andexpeditious manner.

These results. could 'not `be obtained by the use of Vsteain-heatedpipes, arranged within the lofts, as has hitherto been the practice, forthe reason that there were no `effectual means of discharging the humidhot ail' from the dl'yingjlfos, nor any provision for producingpositive` RGOH and circulation of dry, heatedair among the folds ofhanging paper.

The effect 0f this former method was the destruction of theanimal-Sizing by humidity, cold, or heat, and stagnation -of vaporsenveloping the paper.

In the accompanying drawings- A B C denote. the three stories of adrying-house.

The furnace 1),.within the air-drum E, is connected with chimney F bythe pipe G, and the mouth of the furnace D is at the exterior of thehouse, as represented in g. 3.

The blower, which consists of a drum, with a shaft and fans, isconnected, at the bottom, with the bottom of drum E, by the rectangularbox, I, which serves as an induction-air tube.

Upon the second and third floors, the distributingtubes are arranged, asrepresented in iig. 5.

These tubes are connected, by tubes b, with the hot 'air drum E, at theopenings, c d, therein.

The damper-s e f g are provided for regulating the admission of hot airto the tubes a c, and thence into the chambers, or either of them; alsofor closing off the admission, as may be required, from time to time.

There are six Ventilating-fines, M, which extend from the second floorto some distance above the house, and each of them may be provided withone or two adjustable sliding doors, N, forthe emission of the air.

The distributing-tubes a a are provided with double series of adjustablesliding doors, o o',y arranged along the sides of the tubes, to regulateand control the 'admission of air into the drying-lofts.

The currentslof air forced through at the doors o and o cause a thoroughdiffusion of heated air throughout the lofts, and the attendant will beable to regulate and control these currents, by means of the slides ordoors, so as to direct a greater'or less volume of air to any part ofthe lofts or chambers where it may be necessary to accelerate thedrying.

The paper to be dried is hung upon b ars, arranged in suitable frames,and several sheets or thicknesses of the paper, one upon another, inclose contact, constituting folios, ll the entire chamber.

The gates N may be arranged near the iioors, or at any elevation, in theVentilating-fines M, to draw off the air, which .will descend along thewalls, after being charged with humidity, in passing up among the foldsof damp paper.

It will be observed that the dampers e fg may be adjusted so as todirect the entire volume and current of air generated by the. blower Hinto either of the drying-lofts, and that the adjustment of the slidingdoors o o may be such as to force the currents of air to any particularlocality within the chambers or lofts.

'lhe end of the fan-shaft of the blower may be provided with severalpulleys, of differing sizes, by which means different degrees of speedmay be given to the fan by a ,driving-belt, and thereby the volume ofAair and quantity of heat a given body of air will convey may be variedand changed atthe pleasure of the attendant.

From the foregoing description, it will he apparent that tbe air forcedbythe blower through the drum E, surrounding the heated flnnace, will beheated, and, in that condition, will enter the distributing-tubes a. a,and will issue throughl the openings at c o', forming currents andcounter-currents, which will produce a general diffusion of the dry,heated air throughout the chambers in which the paper is suspended, and,when vit' becomes laden with vapor thrown off by the drying paper', itwill be forced off through the 'Ventilating-fines, as hereiubeforedescribed.

Having fully described my apparatus for drying Writing-paper,

What I claim as my invention, and desire to secure by Letters Patent, is

The combination of a blower, furnace, air-drum, distributing-tubes,Ventilating-nues, and adjustable dampers and doors, connected andarranged in such a manner as to force a volume of heated air through thedrying-lofts, and to' diiuse, regulate, and control the quantity,temperature, and circulation thereof, substantially in the manner andfor the purpose described. In testimony whereof, I have hereunto set myhand, this 18th day of December, 1868.

A. E. HARDING. Witnesses:

H. P. K. PEUR, G. W. ERWIN.

